import router from "./router";
import store from "./store";
import { getToken } from "@/utils/auth";
import { Message } from "element-ui";
import NProgress from "nprogress"; // 水平进度条提示: 在跳转路由时使用
import "nprogress/nprogress.css"; // 水平进度条样式
import getPageTitle from "@/utils/get-page-title"; // 获取应用头部标题的函数
import Layout from "@/layout";
import ParentView from "@/components/ParentView";
const _import = require("./router/_import_" + process.env.NODE_ENV); // 获取组件的方法

NProgress.configure({ showSpinner: false }); // NProgress Configuration
const whiteList = ["/login"]; // no redirect whitelist
router.beforeEach(async (to, from, next) => {
    NProgress.start();
    // set page title
    document.title = getPageTitle(to.meta.title);
    // determine whether the user has logged in
    const hasToken = getToken();
    if (hasToken) {
        if (to.path === "/login") {
            // if is logged in, redirect to the home page
            next({ path: "/" });
            NProgress.done();
        } else {
            const hasGetUserInfo = store.getters.name;
            if (hasGetUserInfo) {
                next();
            } else {
                try {
                    // get user info
                    await store.dispatch("user/getInfo"); // 请求获取用户信息
                    if (store.getters.menus.length < 1) {
                        global.antRouter = [];
                        next();
                    }
                    const menus = filterAsyncRouter(store.getters.menus); // 1.过滤路由
                    console.log(menus);
                    router.addRoutes(menus); // 2.动态添加路由
                    let lastRou = [
                        { path: "*", redirect: "/404", hidden: true },
                    ];
                    router.addRoutes(lastRou);
                    global.antRouter = menus; // 3.将路由数据传递给全局变量，做侧边栏菜单渲染工作
                    next({
                        ...to,
                        replace: true,
                    });
                    //next()
                } catch (error) {
                    // remove token and go to login page to re-login
                    console.log(error);
                    await store.dispatch("user/resetToken");
                    Message.error(error || "Has Error");
                    next(`/login?redirect=${to.path}`);
                    NProgress.done();
                }
            }
        }
    } else {
        /* has no token*/
        if (whiteList.indexOf(to.path) !== -1) {
            // in the free login whitelist, go directly
            next();
        } else {
            // other pages that do not have permission to access are redirected to the login page.
            next(`/login?redirect=${to.path}`);
            NProgress.done();
        }
    }
});

router.afterEach(() => {
    // finish progress bar
    NProgress.done();
});

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap) {
    const accessedRouters = asyncRouterMap.filter((route) => {
        if (route.component) {
            if (route.component === "Layout") {
                route.component = Layout;
            } else if (route.component === "ParentView") {
                route.component = ParentView;
            } else {
                try {
                    route.component = _import(route.component); // 导入组件
                } catch (error) {
                    // debugger;
                    console.log(error);
                    route.component = _import("dashboard/index"); // 导入组件
                }
            }
        }
        if (route.children && route.children.length > 0) {
            route.children = filterAsyncRouter(route.children);
        } else {
            delete route.children;
        }
        return true;
    });
    return accessedRouters;
}
